Dec 11 09:46:25.845 INFO checking serayuzgur/chainake against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 09:46:25.845 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 09:46:26.144 INFO [stdout] bcb7a3c96438591c6a493a9c29d76868f466a612bb26b409c5c0828c9c65fdea
Dec 11 09:46:26.150 INFO running `"docker" "start" "-a" "bcb7a3c96438591c6a493a9c29d76868f466a612bb26b409c5c0828c9c65fdea"`
Dec 11 09:46:27.070 INFO [stderr] usermod: no changes
Dec 11 09:46:27.184 INFO [stderr]     Checking termion v1.5.1
Dec 11 09:46:28.008 INFO [stderr]     Checking chainake v0.0.1-alpha.1 (/source)
Dec 11 09:46:28.340 INFO [stderr] warning: unused variable: `difficulty`
Dec 11 09:46:28.341 INFO [stderr]   --> src/main.rs:29:25
Dec 11 09:46:28.341 INFO [stderr]    |
Dec 11 09:46:28.341 INFO [stderr] 29 |     fn play( &mut self, difficulty: usize) {
Dec 11 09:46:28.341 INFO [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
Dec 11 09:46:28.341 INFO [stderr]    |
Dec 11 09:46:28.341 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 09:46:28.341 INFO [stderr] 
Dec 11 09:46:28.374 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:46:28.374 INFO [stderr]   --> src/main.rs:42:9
Dec 11 09:46:28.374 INFO [stderr]    |
Dec 11 09:46:28.375 INFO [stderr] 42 |         stdout.flush();
Dec 11 09:46:28.375 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 11 09:46:28.375 INFO [stderr]    |
Dec 11 09:46:28.375 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 09:46:28.375 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:46:28.375 INFO [stderr] 
Dec 11 09:46:28.426 INFO [stderr] warning: unused variable: `difficulty`
Dec 11 09:46:28.426 INFO [stderr]   --> src/main.rs:29:25
Dec 11 09:46:28.426 INFO [stderr]    |
Dec 11 09:46:28.426 INFO [stderr] 29 |     fn play( &mut self, difficulty: usize) {
Dec 11 09:46:28.426 INFO [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
Dec 11 09:46:28.426 INFO [stderr]    |
Dec 11 09:46:28.426 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 09:46:28.426 INFO [stderr] 
Dec 11 09:46:28.448 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:46:28.448 INFO [stderr]   --> src/main.rs:42:9
Dec 11 09:46:28.448 INFO [stderr]    |
Dec 11 09:46:28.448 INFO [stderr] 42 |         stdout.flush();
Dec 11 09:46:28.448 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 11 09:46:28.448 INFO [stderr]    |
Dec 11 09:46:28.448 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 09:46:28.448 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:46:28.448 INFO [stderr] 
Dec 11 09:46:28.509 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
Dec 11 09:46:28.510 INFO [stderr] su: No module specific data is present
Dec 11 09:46:29.188 INFO running `"docker" "inspect" "bcb7a3c96438591c6a493a9c29d76868f466a612bb26b409c5c0828c9c65fdea"`
Dec 11 09:46:29.436 INFO running `"docker" "rm" "-f" "bcb7a3c96438591c6a493a9c29d76868f466a612bb26b409c5c0828c9c65fdea"`
Dec 11 09:46:29.587 INFO [stdout] bcb7a3c96438591c6a493a9c29d76868f466a612bb26b409c5c0828c9c65fdea